An image sensing device includes a pixel array; a plurality of lines coupled to the pixel array; a readout circuit coupled to the plurality of lines and structured to output a readout reset signal and a readout data; first readout lines coupled to the readout circuit and structured to transfer readout reset signals and readout data signals; a global counter coupled to count the readout reset signals and the readout data signals; a first storing circuit coupled to the first readout lines to receive the readout reset signals and the readout data signals; a line control circuit coupled to the first storing circuit; second readout lines coupled to the line control circuit and structured to transfer the readout control signals received from the line control circuit; and a second storing circuit coupled to the second readout lines to receive the readout control signals.
Legal claims defining the scope of protection, as filed with the USPTO.
1. An image sensing device, comprising: a pixel array including one or more pixel groups, each pixel group generating a reset signal and a data signal; a plurality of lines coupled to the pixel array and structured to transfer reset signals and data signals that are received from pixel groups in the pixel array; a readout circuit coupled to the plurality of lines and structured to output (1) a readout reset signal based on a reset signal from a pixel group during a first period of a control signal and (2) a readout data signal based on a data signal from the pixel group during a second period of the control signal, the control signal having different logic values during the first period and the second period and the second period proceeding after the first period; first readout lines directly coupled to the readout circuit and structured to transfer readout reset signals and readout data signals that are associated with the pixel groups in the pixel array and are received from the readout circuit; a global counter coupled to count the readout reset signals and the readout data signals and structured to generate global count signals represented count values in response to the readout reset signals and the readout data signals, respectively; a first storing circuit directly coupled to the first readout lines to receive the readout reset signals and the readout data signals and further coupled to the global counter to receive and store the count values that correspond to the readout reset signals and the readout data signals; a line control circuit coupled to the first storing circuit and structured to selectively receive the readout reset signals from the readout circuit based on the control signal and to generate readout control signals that respectively correspond to the readout reset signals; second readout lines directly coupled to the line control circuit and structured to transfer the readout control signals received from the line control circuit; and a second storing circuit directly coupled to the second readout lines to receive the readout control signals from the line control circuit and further coupled to the global counter to receive and store the count values that correspond to the readout reset signals, wherein the line control circuit is configured to couple the first readout lines to the second readout lines during the first period of the control signal and to separate the first readout lines from the second readout lines during the second period of the control signal.
2. The image sensing device of claim 1 , wherein the line control circuit is configured to couple the first readout lines to the second readout lines during the first period of the control signal and to couple the second readout lines to the ground voltage during the second period of the control signal.
3. The image sensing device of claim 1 , wherein the second period of the control signal proceeds after the first period of the control signal.
4. The image sensing device of claim 1 , wherein the first storing circuit is configured to replace the count values that correspond to the readout reset signals with the count values that correspond to the readout data signals.
5. The image sensing device of claim 1 , wherein the first storing circuit stores the count values that correspond to the readout reset signals during the first period of the control signal, and stores the count values that correspond to the readout data signals during the second period of the control signal, wherein the second storing circuit stores the count values that correspond to the readout reset signals during the first period and maintains, during the second period of the control signal, the count values that have been stored during the first period.
6. The image sensing device of claim 1 , wherein the reset signal is transferred before the data signal is transferred.
7. The image sensing device of claim 1 , wherein the second storing circuit stores the count values that correspond to the readout reset signals when the first storing circuit replaces the count values that correspond to the readout reset signals with the count values that correspond to the readout data signals.
8. The image sensing device of claim 1 , wherein the readout circuit includes: a plurality of conversion circuits structured to convert the reset signals into digital typed reset signals and convert the data signals into digital typed data signals; and a plurality of trigger circuits structured to generate the readout reset signals when the reset signals are transited to the digital typed reset signals and the readout data signals when the data signals are transited to the digital typed data signals.
9. The image sensing device of claim 1 , wherein the pixel array includes a plurality of pixels arranged in column and row directions, and each of the pixel groups includes pixels arranged in a same row.
10. The image sensing device of claim 1 , wherein the first storing block is disposed more adjacent to the pixel array than the second storing block is.
11. An image sensing device, comprising: a pixel generating a reset signal during a readout reset period and a data signal during a readout data period, wherein the readout data period proceeds after the readout reset period; a global counter coupled to receive a readout reset signal corresponding to the reset signal and a readout data signal corresponding to the data signal and configured to generate global count signals represented count values in response to the readout reset signal and the readout data signal, respectively; a first storing circuit coupled to the global counter to receive and store count values that correspond to the readout reset signal and the readout data signal; and a second storing circuit coupled to the global counter to receive and store count values that correspond to the readout reset signal, wherein a first distance between the first storing circuit and the pixel is shorter than a second distance between the second storing circuit and the pixel.
12. The image sensing device of claim 11 , further comprising: a first readout line coupled to the first storing circuit; a conversion circuit located to receive the reset signal and the data signal and configured to convert the reset signal into a digital typed reset signal and convert the data signal into a digital typed data signal; a trigger circuit configured to output the readout reset signal to the first readout line, the readout reset signal activated when the reset signal is transited to the digital typed reset signal, and output the readout data signal to the first readout line, the readout data signal activated when the data signal is transited to the digital typed data signal; a second readout line coupled to the second storing circuit; and a line control circuit located to receive a control signal having different logic values during the readout reset period and the readout data period and configured to selectively receive the readout reset signal from the trigger circuit based on the control signal and to transfer the readout reset signal to the second storing circuit.
13. The image sensing device of claim 12 , wherein the line control circuit generates a readout control signal that corresponds to the readout reset signal during the readout reset period, and couples the second readout line to a ground voltage terminal during the readout data period.
14. The image sensing device of claim 12 , wherein the line control circuit either couples the first readout line to the second readout line or separates the first readout line from the second readout line based on the control signal.
15. The image sensing device of claim 14 , wherein the line control circuit couples the first readout line to the second readout line in response to the readout reset signal, and separates the first readout line from the second readout line in response to the readout data signal.
16. The image sensing device of claim 11 , wherein the first storing circuit is configured to replace the count values that correspond to the readout reset signals with the count values that correspond to the readout data signals.
17. The image sensing device of claim 11 , wherein the reset signal is generated before the data signal is generated.
18. The image sensing device of claim 11 , wherein the first storing circuit stores the count values that correspond to the readout reset signal during the readout reset period, and subsequently stores the count values that correspond the readout data signal during the readout data period, wherein the second storing circuit stores the count values that correspond to the readout reset signal during the readout reset period and maintains, during the readout data period, the count values that have been stored during the readout reset period.
19. The image sensing device of claim 11 , wherein the second storing circuit stores the count values that correspond to the readout reset signals when the first storing circuit replaces the count values that correspond to the readout reset signals with the count values that correspond to the readout data signals.
20. An image sensing device, comprising: a pixel array including one or more pixel groups, each pixel group generating a reset signal and a data signal; a plurality of lines coupled to the pixel array and structured to transfer reset signals and data signals that are received from pixel groups in the pixel array; a readout circuit coupled to the plurality of lines and structured to output (1) a readout reset signal based on a reset signal from a pixel group during a first period of a control signal and (2) a readout data signal based on a data signal from the pixel group during a second period of the control signal, the control signal having different logic values during the first period and the second period and the second period proceeding after the first period; first readout lines directly coupled to the readout circuit and structured to transfer readout reset signals and readout data signals that are associated with the pixel groups in the pixel array and are received from the readout circuit; a global counter coupled to count the readout reset signals and the readout data signals and structured to generate global count signals represented count values in response to the readout reset signals and the readout data signals, respectively; a first storing circuit directly coupled to the first readout lines to receive the readout reset signals and the readout data signals and further coupled to the global counter to receive the count values and store the count values that correspond to the readout reset signals during the first period and store the count values that correspond to the readout data signals during the second period; a line control circuit coupled to the first storing circuit and structured to selectively receive the readout reset signals from the readout circuit based on the control signal and to generate readout control signals that respectively correspond to the readout reset signals; second readout lines directly coupled to the line control circuit and structured to transfer the readout control signals received from the line control circuit; and a second storing circuit directly coupled to the second readout lines to receive the readout control signals from the line control circuit and further coupled to the global counter to receive the count values and store the count values that correspond to the readout reset signals during the first period and maintain, during the second period, the count values that have been stored during the first period.
21. The image sensing device of claim 20 , wherein a first distance between the first storing circuit and the pixel array is shorter than a second distance between the second storing circuit and the pixel array.
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October 1, 2018
September 15, 2020
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